WO2003068707A1 - Materiau composite carbone renforce a fibre de carbone resistante a l'oxydation, et procede de production dudit materiau - Google Patents
Materiau composite carbone renforce a fibre de carbone resistante a l'oxydation, et procede de production dudit materiau Download PDFInfo
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- WO2003068707A1 WO2003068707A1 PCT/JP2003/001584 JP0301584W WO03068707A1 WO 2003068707 A1 WO2003068707 A1 WO 2003068707A1 JP 0301584 W JP0301584 W JP 0301584W WO 03068707 A1 WO03068707 A1 WO 03068707A1
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- Prior art keywords
- carbon fiber
- oxidation
- composite material
- powder
- carbon
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 168
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 168
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 145
- 239000002131 composite material Substances 0.000 title claims abstract description 96
- 230000003647 oxidation Effects 0.000 title claims abstract description 87
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 87
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims description 20
- 230000008569 process Effects 0.000 title description 3
- 239000011159 matrix material Substances 0.000 claims abstract description 102
- 229910052580 B4C Inorganic materials 0.000 claims abstract description 70
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000000919 ceramic Substances 0.000 claims abstract description 64
- 239000002245 particle Substances 0.000 claims abstract description 54
- 239000000843 powder Substances 0.000 claims description 146
- 239000004744 fabric Substances 0.000 claims description 66
- 239000002243 precursor Substances 0.000 claims description 56
- 239000002002 slurry Substances 0.000 claims description 54
- 229920003002 synthetic resin Polymers 0.000 claims description 36
- 239000000057 synthetic resin Substances 0.000 claims description 36
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 239000010419 fine particle Substances 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 3
- 239000005539 carbonized material Substances 0.000 claims 1
- 239000004332 silver Substances 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 claims 1
- 239000000463 material Substances 0.000 description 60
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 59
- 235000019441 ethanol Nutrition 0.000 description 34
- 239000005011 phenolic resin Substances 0.000 description 33
- 238000003756 stirring Methods 0.000 description 30
- 230000000052 comparative effect Effects 0.000 description 26
- 238000010438 heat treatment Methods 0.000 description 21
- 230000004580 weight loss Effects 0.000 description 21
- 239000000203 mixture Substances 0.000 description 20
- 239000000835 fiber Substances 0.000 description 17
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 16
- 229920005989 resin Polymers 0.000 description 13
- 239000011347 resin Substances 0.000 description 13
- 238000010008 shearing Methods 0.000 description 13
- 229920003987 resole Polymers 0.000 description 12
- 230000007423 decrease Effects 0.000 description 11
- 229920001568 phenolic resin Polymers 0.000 description 9
- 230000001590 oxidative effect Effects 0.000 description 8
- 238000003763 carbonization Methods 0.000 description 7
- 238000007731 hot pressing Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 5
- 229910001873 dinitrogen Inorganic materials 0.000 description 5
- 239000011295 pitch Substances 0.000 description 5
- 229910052796 boron Inorganic materials 0.000 description 4
- 239000007833 carbon precursor Substances 0.000 description 4
- 239000011812 mixed powder Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 229910010271 silicon carbide Inorganic materials 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 229910052810 boron oxide Inorganic materials 0.000 description 3
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000012779 reinforcing material Substances 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000007849 furan resin Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000012770 industrial material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011300 coal pitch Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000002296 pyrolytic carbon Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/563—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on boron carbide
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9684—Oxidation resistance
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
- C04B2237/70—Forming laminates or joined articles comprising layers of a specific, unusual thickness
- C04B2237/704—Forming laminates or joined articles comprising layers of a specific, unusual thickness of one or more of the ceramic layers or articles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
- Y10T428/249927—Fiber embedded in a metal matrix
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
- Y10T428/249928—Fiber embedded in a ceramic, glass, or carbon matrix
- Y10T428/249929—Fibers are aligned substantially parallel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer
Definitions
- Oxidation resistant carbon fiber reinforced carbon composite material and method for producing the same
- the present invention relates to a carbon fiber reinforced carbon composite material having oxidation resistance, and particularly to trays and shelves of heat treatment furnaces used for sliding materials for machinery, metallurgy, ceramic sintering and ferrite heat treatment, and hot press.
- the present invention relates to materials used for parts and glass bottle production lines, and to oxidation-resistant carbon fiber reinforced carbon composite materials used in high-temperature oxidizing atmospheres such as for aerospace. Background art
- Carbon fiber reinforced carbon composite materials (hereinafter referred to as C / C composite materials) have the disadvantages of low toughness and brittleness, which are the drawbacks of the artificial graphite material used for the isotropic graphite tin, which is the characteristic of the electrode material. This is a significantly improved material.
- the CZC composite material is also a carbon material, and has a disadvantage that it is oxidized and consumed in air at a high temperature of 400 ° C. to 500 ° C. or more. Therefore, the range of use of the C / C composite material is limited.
- Patent No. 3,058,180 describes a method of applying a mixture of boron carbide to a thermosetting resin, coal tar or pitch as a matrix, and a CZC composite by thermal decomposition of a boron-containing gas.
- a method of including B 4 C in the material is shown, which indicates that the oxidation consumption rate at 1200 ° C. is lower than that of the material not containing boron carbide.
- this method also lacks a specific method of uniformly dispersing B 4 C in C C composites.
- oxidation resistance due to the inclusion of the original B 4 C is acting that by the acid I arsenide protective layer of B 2 0 3.
- B 2 0 3 is evaporated, can not be obtained basic oxidation resistance. Nevertheless, oxidation at around 800 ° C. has not been evaluated.
- 2D—CZC composite materials are the most useful and antioxidant materials for general industrial use.
- 1D—C / C composites using one-dimensional carbon fiber ⁇ ⁇ 2D—CZC composites are more difficult than felt CZC composites. Materials that have oxidation resistance and self-healing properties have not been sufficiently developed as practical materials.
- the present invention is intended for general industrial use that has been provided with oxidation resistance at high temperatures in the atmosphere by a method that is easy to manufacture without impairing the high strength and high toughness characteristics of the C / C composite material. It is intended to provide an acid-resistant CC composite material that can be widely used in China. Disclosure of the invention
- the present inventors have conducted intensive studies and found that a method of selecting ceramic powder to provide sufficient oxidation resistance to the cZc composite material and a method of dispersing the ceramic powder are described. It was found to be extremely important, and the present invention was completed. That is, the oxidation-resistant C / C composite material according to the present invention is an oxidation-resistant carbon fiber-reinforced carbon composite material composed of 20% by volume or more of carbon fiber and matrix, wherein the matrix has at least A ceramic powder having a boron carbide powder having an average particle size of 5 zm or less is contained, and the amount of the ceramic powder is 32% by volume or more based on the volume of the carbon fiber.
- the Lamix powder oxidizes to form an oxidation-resistant protective film over the entire czc composite.
- the amount of the ceramic box powder, relative volume of carbon fiber 3 2 capacity 0 /. Preferably it is ⁇ 76% by volume. If the amount of the ceramic mix powder is less than 32% by volume, it is difficult to form an oxidation-resistant protective film over the entire area of the C / C composite. If it exceeds 7 6 capacity ° / 0, with becomes cost high, leading to decrease in strength.
- excess ceramic powder may remain on the surface of the carbon fiber cloth or sheet, making the production more difficult.
- the ceramic powder in the matrix is made to be 32% by volume or more with respect to the carbon fiber, when the ceramic powder is mixed, simply by mixing the ceramic powder, aggregation of the ceramic powder occurs. As a result, the ceramic powder partially aggregates and a uniform oxidation-resistant protective film cannot be formed. In addition, the inhomogeneity of the C / C composite results in poor properties such as mechanical strength. This can be solved by using a supermixer or the like, which is obtained by sufficiently disintegrating the ceramic powder while applying a shearing force and mixing it so as not to aggregate with other matrix or matrix precursor.
- the average particle size of the ceramic powder is 5 ⁇ or less, preferably 3 / im or less, and more preferably 1 to 3 / ⁇ .
- the average particle size of the ceramic powder is 5 ⁇ or less, preferably 3 / im or less, and more preferably 1 to 3 / ⁇ .
- boron carbide powder and silicon carbide powder are particularly preferable.
- boron carbide powder and silicon carbide powder are particularly preferable.
- boron carbide powder and silicon carbide powder are particularly preferable.
- boron carbide powder and silicon carbide powder are particularly preferable.
- boron carbide powder and silicon carbide powder are particularly preferable.
- boron carbide powder and silicon carbide powder are particularly preferable.
- boron carbide powder it is possible to substantially eliminate oxidation consumption in a temperature range up to 800 ° C.
- silicon carbide when only silicon carbide is used, an oxidation-resistant film is difficult to form, and the oxidation resistance is not substantially improved. In this case, the value as an industrial material is low.
- oxidation resistance temperature is determined by the viscosity and evaporation temperature of the oxidation resistant protective film formed at a high temperature in an oxidizing atmosphere.
- the control is determined by the combination of ceramic powders selected. For example, when only boron carbide powder is used, an oxidation-resistant film made of glassy boron oxide is formed. When boron carbide powder and silicon carbide powder are used, a glass layer in which boron oxide and silicon oxide are mixed is formed as an oxidation-resistant film. In this way, it is only necessary to set such that an oxidation-resistant film capable of expressing oxidation resistance in an important temperature region is formed according to the purpose. For example, in order to exhibit oxidation resistance in a temperature range as wide as possible, it is preferable that boron carbide is mixed with silicon carbide at a ratio of about 1.2 times in weight.
- the volume fraction of the carbon fiber is 20% by volume or more, and preferably 20 to 50% by volume. If the volume fraction of the carbon fiber exceeds 50% by volume, the bonding strength between the carbon fiber cloth and the sheet cannot be sufficiently maintained, and it is practically difficult to produce the carbon fiber cloth and the sheet in the present invention. On the other hand, when the content is less than 20% by volume, the effect of the carbon fiber is reduced, and the toughness ⁇ mechanical strength does not increase.
- the carbon fiber can be either a fine woven spun yarn cloth or a long carbon fiber continuous yarn cloth, a two-dimensional woven cloth, a one-dimensional long carbon fiber sheet, or a short carbon fiber and a fine woven spun yarn cloth or long carbon fiber continuous.
- a two-dimensional woven cloth of yarn cloth or a one-dimensional long carbon fiber sheet It is also possible to use a combination of two or more of finely woven spun yarn cloth, long carbon fiber continuous yarn cloth, and one-dimensional long carbon fiber sheet. In particular, those made by combining a finely woven spun yarn cloth and a continuous carbon fiber yarn cloth can be used as a high toughness C / C composite.
- 2D cloth As the two-dimensional woven cloth (hereinafter, referred to as 2D cloth), a fiber having a fiber diameter of 10 to 20 ⁇ m and a filament number of 1, 000, 1200 can be used. .
- these cloths may be appropriately selected depending on the intended use, such as satin-folded or plain-woven long fiber continuous yarn, or finely woven spun yarn cross-spun fibers.
- the matrix contains a carbonized substance generated from a liquid synthetic resin or from a liquid synthetic resin and a synthetic resin powder. It also contains mesocarbon small spheres and / or carbon powder containing 5 to 15% by weight of residual volatile matter.
- the synthetic resin it is preferable to use a phenol resin having a high carbonization yield. This makes it possible to reduce the production cost.
- a phenol resin by using a phenol resin, a short carbon fiber chip can be added as a reinforcing material.
- a furan resin or the like can be used. Then, ethyl alcohol or the like can be used as the solvent.
- oxidation resistant carbon fiber reinforced carbon composite material according to the present invention, a 2 0 Capacity 0/0 or more carbon fibers, are composed of a matrix, liquid coupling A slurry-like matrix precursor formed by mixing a synthetic resin with a ceramic powder having a boron carbide powder having an average particle diameter of at least 5 // ⁇ which is at least 32% by volume based on the volume of the carbon fiber. Is uniformly applied to a cloth-like or sheet-like carbon fiber, and the carbon fiber is laminated and fired.
- the slurry-like matrix precursor is evenly penetrated into the cloth-like or sheet-like carbon fibers, it is further uniformly applied to the surface, and the carbon fibers are laminated and fired. This allows the matrix precursor to spread to every corner of the carbon fiber.
- the slurry-like matrix precursor is evenly penetrated into the cloth or sheet-like carbon fiber, it is further uniformly applied to the surface, and the carbon fiber is laminated and fired, and then the pitch or the pitch is further increased. It can be impregnated with synthetic resin and carbonized.
- the viscosity of the slurry-like matrix precursor is adjusted to 5 mPa ⁇ s to 40 mPa 's, preferably 8 mPa ⁇ s to 25 mPa ⁇ s. If the viscosity is high, the matrix precursor does not penetrate sufficiently into the carbon fiber cloth or sheet. On the other hand, if the viscosity is too low, it will be difficult to allow a sufficient amount of boron carbide powder to be present per unit area.
- the matrix precursor may contain mesocarbon small spheres, carbon powder containing residual volatile matter of 5 to 15% by weight / 0 , short carbon fiber, and the like. Thereby, the mechanical characteristics can be improved.
- one or more of synthetic resin powder, mesocarbon small spheres, carbon powder containing 5 to 15% by weight of residual volatile matter, and short carbon fiber, and powder obtained by solidifying the ceramic mix powder into solid fine particles The matrix precursor in the form of a slurry mixed with Alternatively, the carbon fibers may be laminated and fired. After the slurry-like matrix precursor is uniformly applied to the cloth or sheet-like carbon fiber, the surface further contains synthetic resin powder, mesocarbon spheres, and 5 to 15% by weight of residual volatile matter.
- One or more of carbon powder and short carbon fiber and ceramic powder may be integrally applied as a solid fine powder, and the carbon fiber may be laminated and fired.
- the synthetic resin powder, mesocarbon small spheres, carbon powder containing 5 to 15% by weight of residual volatile matter, short carbon fiber, and ceramic powder are uniformly dispersed, and the binder is effectively used. And mechanical properties can be improved.
- the operation of the integrated solid fine particles is performed, for example, using a commercially available fine particle composite device.
- FIGS. 1 (a), (b), and (c) are tables showing characteristics of examples and comparative examples of the present invention.
- FIG. 2 is a graph showing the weight loss due to oxidation at 800 ° C. in the atmosphere of Examples 1, 4, 7, 13, 13 and 16 and Comparative Examples 1, 5, and 6 of the present invention. is there.
- FIG. 3 is a graph showing the weight loss due to oxidation at 900 ° C. in air in Examples 1, 10, 13, 16 and Comparative Examples 4, 5, 6 of the present invention.
- FIG. 4 is a graph showing the weight loss due to oxidation at 100 ° C. in air in Examples 10 and 16 and Comparative Example 4 of the present invention.
- FIG. 5 is a graph showing the weight loss due to oxidation in air at 1200 ° C.
- FIG. 6 is a graph showing the weight loss due to oxidation at 800 ° C. in the air of Examples 19, 20, 21, 22, and Comparative Example 7 of the present invention.
- a molded body is produced by combining a carbon fiber and a matrix precursor.
- the matrix and the carbon fiber be combined sufficiently uniformly.
- Examples of the form of carbon fiber include a two-dimensional cloth and a one-dimensional sheet.
- a slurry-like matrix precursor is applied to these carbon fibers. The application is carried out by brushing or applying a doctor blade to the surface, or by penetrating the slurry by rubbing the carbon fiber.
- the viscosity of the slurry-like matrix precursor is adjusted to 5 mPa-s to 40 mPa-s, preferably 8 mPa-s to 25 mPa-s.
- the viscosity is high, the matrix precursor does not sufficiently penetrate the carbon fiber cloth or sheet. On the other hand, if the viscosity is too low, it will be difficult to allow a sufficient amount of boron carbide powder to be present per unit area.
- the viscosity can be adjusted by appropriately replenishing ethyl alcohol or the like.
- the matrix precursor synthetic resin as a binder component and carbon powder and short carbon fiber containing volatile components as mesocarbon spheres and other components are added and mixed.
- the type of the synthetic resin is not particularly limited, a phenol resin or a furan resin is appropriate from the viewpoint of obtaining a high carbonization yield and cost.
- the ceramic powder is dispersed in an alcohol such as ethanol to prevent reaggregation, and then the dispersion is mixed with the synthetic resin and another matrix. Slurry with sufficient agitation with the components to produce a matrix precursor.
- solid ultra-fine particles integrated with the above-mentioned slurry can be used in combination. That is, for example, after applying a slurry to a carbon fiber cloth or sheet, solid fine particles are placed thereon, and the carbon fiber cloth or sheet can be laminated.
- High density can be achieved by adding powder.
- the amount of carbon generated from these is set to a large value, large cracks will occur in the matrix and the mechanical strength will be significantly reduced. This is because the mesocarbon spherules and the carbon powder containing volatiles shrink, but the carbon fibers do not shrink, causing internal stress and cracking when releasing them.
- the cloth or sheet to which the slurry has been applied is laminated to a desired thickness, for example, 3 to 30 mm to form a prepreg laminate.
- the prepreg laminate is formed into a compact by hot pressing.
- the conditions for hot pressing include conditions such as the type of synthetic resin used, the type and amount of carbon fiber used, and the size of the compact. It should be set according to the conditions, but it is carried out at a maximum temperature of 150 to 300 ° C under a pressure of approximately 5 to 15 kg / cm 2 .
- This compact is carbonized to obtain an oxidation-resistant CZC composite material.
- the heat treatment is performed at 800 to 200 ° C. in a non-oxidizing atmosphere such as a nitrogen gas atmosphere. A change in the heat treatment temperature in this range does not cause a significant change in the oxidation resistance and mechanical properties, so that the heat treatment may be performed at a necessary temperature according to the application.
- the temperature at which oxidation resistance is maintained can be controlled by selecting the type and combination of ceramic powders used. For example, when the operating temperature range is 800 ° C. or less in the atmosphere, boron carbide powder is used as the ceramic powder to be used. In addition, by using both the carbon carbide powder and the silicon carbide powder up to 800 ° C. and up to 1200 ° C., an oxidation-resistant C / C composite material having substantially less oxidation consumption is obtained. be able to. As described above, the oxidation-resistant C / C composite material of the present invention can be produced by a simple method, has sufficient toughness, and can maintain the characteristics of the mechanical properties of the CZC composite material.
- Boron carbide powder having an average particle size of 3/1 m was added to ethyl alcohol such that the volume fraction in the matrix became 51% by volume, and dispersed with sufficient stirring.
- the amount of ethyl alcohol depends on the amount of synthetic resin added next. Equal amounts were used.
- a resole-type phenol resin as a liquid synthetic resin was added so that the weight ratio with the carbon fiber was 1.1, and the mixture was dispersed with sufficient stirring to form a slurry, thereby preparing a matrix precursor.
- This slurry was uniformly applied to a 2D cloth finely woven cloth (fiber diameter about 10 zm, PAN system) using a doctor blade. At this time, the slurry was previously rubbed into the cloth so that the slurry penetrated into the cross, and the remaining slurry was applied to the surface. These cloths coated with the slurry were laminated and air-dried. The size of the cloth was 8 Omm x 8 Omm, and 15 sheets were stacked to form a pre-reader laminate with a thickness of about 7 mm.
- hot pressing was performed according to a conventional method.
- the molding was performed by starting pressurization at 110 ° C. while applying a pressure of about 10 kg / cm 2 and holding at 160 ° C. for 1 hour. Thereafter, a heat treatment was performed at 260 ° C. for 16 hours using a dryer to obtain a molded body.
- This molded body was subjected to a heat treatment at 100 ° C. at a heating rate of about 10 ° C.Z while flowing nitrogen gas, and was fired to obtain a c ′′ c composite material.
- a CZC composite material was obtained in the same manner as in Example 1, except that a boron carbide powder having an average particle size of 1 ⁇ was used.
- the volume fraction in the matrix of boron carbide powder having an average particle size of 1 / im was adjusted to 56% by volume, and the weight ratio of the resole phenol resin added to the carbon fiber was adjusted to 0.9. Except for the above, a C / C composite material was obtained in the same manner as in Example 1.
- Example 2 a resole-type phenol resin was added so that the weight ratio with respect to the carbon fiber was 1.1, and dispersed with sufficient stirring to obtain a slurry.
- Other steps were the same as in Example 1 to obtain a cZc composite material.
- boron carbide powder having an average particle diameter of 1 ⁇ m in which the volume fraction in the matrix is 52% by volume and an amount of mesocarbon in which the weight ratio of carbon fiber to 0.4 is 0.4
- the spheres were sufficiently mixed with a super mixer while applying shearing force.
- the rotational speed of the mixer blades was 2000 rpm and the time was 3 minutes. If this process is neglected, it will be difficult for the boron carbide powder and the mesocarbon spherules to mix sufficiently.
- This mixed powder was dispersed in ethyl alcohol with sufficient stirring.
- the amount of alcohol used was approximately equal to the amount of resin to be added next.
- a resole type phenol resin was added so that the weight ratio with the carbon fiber was 1.1, and dispersed with sufficient stirring to obtain a slurry.
- Other steps were the same as in Example 1 to obtain a cZc composite material.
- matrix precursors Two types were prepared as matrix precursors. The first is that the boron carbide powder having an average particle size of 1 / zm in an amount such that the volume fraction in the matrix becomes 26% by volume is not sufficiently stirred in ethyl alcohol. Then, a resole phenol resin was added thereto so that the weight ratio with the carbon fiber became 1.1, and the mixture was dispersed with sufficient stirring to obtain a slurry (this is referred to as A).
- the other matrix is composed of a carbon carbide powder having an average particle size of 1 / im in an amount such that the volume fraction in the matrix is 26% by volume, and a weight ratio of 0.4 to carbon fiber.
- the powdered phenolic resin as a synthetic resin powder having a weight ratio of 0.5 to a given amount of carbon powder and carbon fiber was sufficiently mixed with a supermixer while applying a shearing force.
- the rotation speed of one mixer blade was 1500 rpm and the time was 3 minutes.
- the mixture was subjected to fine particle compounding treatment using a hybridizer of Nara Machinery Works. Processing was performed at a blade rotation speed of 1200 rpm for 3 minutes (this is B).
- the matrix precursor A and the matrix precursor B were mixed and uniformly applied to the finely woven cloth by the method shown in Example 1. Fifteen such cloths were stacked to form a prepreg laminate having a thickness of about 9 mm.
- boron carbide powder having an average particle size of 3 / i in such that the volume fraction in the matrix is 51% by volume, and an average length such that the volume fraction of the entire material is 10% by volume was sufficiently mixed with a short carbon fiber of 30 ⁇ while applying a shearing force with a super mixer.
- the rotation speed of the mixer blades was 2000 rpm and the time was 3 minutes.
- This mixed powder was dispersed in ethyl alcohol with sufficient stirring. Alcoholic The amount was approximately equal to the amount of the resin to be added next.
- a resole type phenol resin was added so that the weight ratio with respect to the carbon fiber in the material was 1.1, and the mixture was dispersed with sufficient stirring to obtain a slurry.
- Other steps were the same as in Example 1 to obtain a cZc composite material.
- a boron carbide powder having an average particle size of 3 ⁇ m in an amount such that the volume fraction in the matrix is 51% by volume, and an average length in which the volume fraction of the entire material is 5% by volume A short carbon fiber of 1000 / zm was sufficiently mixed with a super mixer while applying a shearing force. The rotation speed of the blades of the mixer was 2000 rpm and the time was 3 minutes. This mixed powder was dispersed in ethyl alcohol with sufficient stirring. The amount of alcohol was used in approximately the same amount as the amount of resin to be added next.
- Example 10 Two matrix precursors were prepared as matrix precursors.
- One is a boron carbide powder with an average particle size of 3 / zm with a volume fraction of 29% by volume based on carbon fibers in the material, and an average particle with a volume fraction of 19.5% by volume based on carbon fibers in the material.
- Silicon carbide powder having a diameter of 3 ⁇ was dispersed in ethyl alcohol with sufficient stirring. The amount of alcohol was used in approximately the same amount as the amount of resin added next. Next, a resole type phenol resin was added so that the weight ratio with respect to the carbon fiber in the material was 0.8, and dispersed with sufficient stirring to obtain a slurry (referred to as “ ⁇ ”).
- the other matrix precursor is a boron carbide powder having an average particle size of 3 ⁇ with a volume fraction of 29 volume ° / 0 with respect to the carbon fiber in the material, and a volume fraction with respect to the carbon fiber in the material of 1 9.5% by volume of silicon carbide powder with an average particle size of 3 ⁇ , short carbon fibers with an average length of 30 ⁇ and a volume fraction of 7% by volume with respect to the entire material, and carbon fibers in the material.
- a powder phenol resin having a weight ratio of 0.4 were sufficiently mixed with a super mixer while applying a shearing force.
- the rotation speed of the mixer blades was 1500 rpm and the time was 3 minutes.
- the mixture was subjected to fine particle composite treatment using a hybridizer of Nara Machinery Works. The treatment was performed at a blade rotation speed of 1200 rpm for 3 minutes (referred to as B).
- the other steps were the same as in Example 6 to obtain a C / C composite material.
- Two matrix precursors were prepared as matrittus precursors.
- the volume fraction of carbon fiber in the material is 28.5 volumes. /.
- Flat A boron carbide powder having an average particle diameter of 3 ⁇ and a silicon carbide powder having an average particle diameter of 10 // m with a volume fraction of 19% by volume based on the carbon fiber in the material are sufficiently stirred in ethyl alcohol. While dispersing.
- the amount of alcohol was used in approximately the same amount as the amount of the resin added next.
- a resole type phenol resin was added so that the weight ratio with respect to the carbon fiber in the material was 0.8, and dispersed with sufficient stirring to obtain a slurry (this is referred to as A).
- Another matrix precursor is a boron carbide powder having an average particle diameter of 3 / m with a volume fraction of 28.5% by volume based on the carbon fiber in the material, and a volume fraction based on the carbon fiber in the material.
- There are 19 capacity. / 0 average particle size of 10 ⁇ and a powdered phenolic resin with a weight ratio of 0.4 to carbon fiber in the material were sufficiently mixed by applying a shearing force with a super mixer. .
- the rotation speed of the mixer blade was 1500 rpm and the time was 3 minutes.
- the mixture was subjected to fine particle composite treatment using a hybridizer of Nara Machinery Works. Processing was performed at a blade rotation speed of 1200 rpm for 3 minutes (this is referred to as B).
- Other steps were the same as in Example 6 to obtain a C ′′ C composite material.
- a plain weave cloth is used as the carbon fiber.
- Boron carbide powder with an average particle size of 3 ⁇ is adjusted so that the volume fraction in the matrix is 59% by volume.
- a CZC composite material was obtained in the same manner as in Example 1, except that the ratio was 1.25.
- a plain weave cloth is used as carbon fiber, and a carbon carbide powder having an average particle diameter of 1 ⁇ m is adjusted so that the volume fraction in the matrix becomes 51% by volume, and the resole phenol resin added is added to the carbon fiber by weight.
- Example 15 Two matrix precursors were prepared as matrix precursors. First, a boron carbide powder having an average particle size of 3 ⁇ m having a volume fraction of 28.5% by volume in the matrix was dispersed in ethyl alcohol with sufficient stirring. The amount of alcohol was used in substantially the same amount as the amount of the resin to be added next. Next, a phenol resin was added so that the weight ratio with respect to the carbon fiber in the material was 0.8, and the mixture was dispersed with sufficient stirring to obtain a slurry (this is referred to as A).
- the precursor is a boron carbide powder with an average particle size of 3 / xm with a volume fraction of 28.5% by volume in the matrix and a powder with a weight ratio to carbon fiber of 0.4 in the material.
- the rotation speed of one wing of the mixer was 1500 rpm and the time was 3 minutes.
- the mixture was subjected to fine particle composite processing using a hybridizer of Nara Machinery Works. The treatment was performed at a blade rotation speed of 1200 rpm for 3 minutes (referred to as B).
- Two matrix precursors were prepared as matrix precursors.
- One is a boron carbide powder having an average particle diameter of 1 ⁇ with a volume fraction of 30% by volume with respect to the carbon fiber in the material, and an average particle diameter with a volume fraction of 20% by volume with respect to the carbon fiber in the material.
- the ⁇ silicon carbide powder was dispersed in ethyl alcohol with sufficient stirring. The amount of alcohol used was approximately equal to the amount of resin added next. Next, the resole type phenol resin was added so that the weight ratio with respect to the carbon fiber in the material was 0.8, and dispersed with sufficient stirring to obtain a slurry (referred to as “ ⁇ ”).
- Another matrix precursor has a volume fraction of 30 volumes to carbon fiber in the material. /.
- Average grain of A boron carbide powder having a diameter of 1 ⁇ , a carbon carbide powder having an average particle size of 3 / m with a weight ratio of 0.4 to carbon fiber in the material, and a volume fraction of 40 to the carbon fiber in the material 0 / 0 powder phenolic resin was sufficiently mixed with a super mixer while applying a shearing force.
- the rotation speed of one blade of the mixer was 1500 rpm and the time was 3 minutes.
- the mixture was subjected to fine particle composite treatment using a hybridizer of Nara Machinery Works. The treatment was performed at a blade rotation speed of 1200 rpm for 3 minutes (this is B).
- the other steps were the same as in Example 6 to obtain a CZC composite.
- a czc composite material was obtained in the same manner as in Example 1, except that a one-dimensional sheet was used as the carbon fiber.
- boron carbide having an average particle size of 1 / xm with a volume fraction of 60% by volume relative to carbon fibers in the material so that the volume fraction of the ceramic powder in the matrix is 59% by volume.
- the powder and a silicon carbide powder having an average particle size of 3 m and a volume fraction of 40% by volume with respect to carbon fibers in the material were dispersed in ethyl alcohol with sufficient stirring.
- the amount of alcohol was used in approximately the same amount as the amount of resin to be added next.
- a resole type phenol resin was added so that the weight ratio with respect to the carbon fiber in the material was 1.1, and dispersed with sufficient stirring to obtain a slurry.
- One-dimensional sheets were used for carbon fibers. Other steps are the same as in Example 1 c
- the boron carbide powder is not mixed with a super mixer
- the mixture was thoroughly mixed and disentangled while applying force.
- the mixing by the super mixer was performed at a rotation speed of the mixer blade of 1,500 rpm for 3 minutes.
- the weight of ethyl alcohol was 1.7 times the weight of boron carbide.
- a resole-type phenol resin as a liquid synthetic resin was added so that the weight ratio with respect to the carbon fiber was 0.8, and the mixture was dispersed with sufficient stirring to form a slurry, thereby preparing a matrix precursor.
- This slurry was uniformly applied to a 2D cloth finely woven spun yarn cloth (PAN system having a fiber diameter of about 1 ⁇ ) using a doctor blade. At this time, the slurry was previously rubbed into the cloth so that the slurry penetrated into the cloth, and the remaining slurry was applied to the surface. At this time, the slurry viscosity at the working temperature was lmPas. These cloths coated with the slurry were laminated and air-dried. The size of the cloth was 8 Omm x 8 Omm, and fifteen sheets were stacked to form a pre-preda laminate having a thickness of about 5 mm. Next, hot pressing was performed according to a conventional method.
- the molding was performed by starting the caro pressure from 110 ° C. while applying a pressure of about 40 kg g cm 2 and maintaining the temperature at 160 ° C. for 1 hour. After that, heat treatment is performed at 260 ° C for 16 hours using a dryer to form a molded body. Thus, a C / C composite material was obtained. Further, the C / C composite was impregnated with a liquid phenol resin under vacuum. This was subjected to a heat treatment at 100 ° C. while flowing nitrogen gas, and calcined to be carbonized. The bulk density of the obtained material was 1.63 g / cm 3 , and the flexural strength was 9 OM Pa.
- Average particle size equivalent to 43 parts by volume for 100 parts by volume of carbon fiber 3 ⁇ m of boron carbide was added to ethyl alcohol and dispersed with sufficient stirring.
- the boron carbide powder was thoroughly mixed with a supermixer while applying shearing power to dissolve the powder.
- the mixing by the super mixer was performed at a rotation speed of one mixer blade of 1,500 rpm for 3 minutes.
- the weight of ethyl alcohol was 1.7 times the weight of boron carbide.
- a resole-type phenol resin as a liquid synthetic resin was added so that the weight ratio with the carbon fiber was 1.2, and the mixture was dispersed with sufficient stirring to form a slurry, thereby preparing a matrix precursor.
- This slurry was uniformly applied to a 2D cloth finely woven spun yarn cloth (PAN system with a fiber diameter of about 10 im) using a doctor blade. At this time, the slurry was applied in advance by rubbing it into the mouth so that the slurry penetrated into the cloth, and the remaining slurry was applied to the surface. At this time, the slurry viscosity at the working temperature was 13 mPa ⁇ s. These cloths coated with the slurry were laminated and air-dried. The size of the cloth was 8 OmmX8 Omm, and 15 cloths were stacked to form a pre-preda laminate having a thickness of about 5 mm. Next, hot pressing was performed according to a conventional method.
- the molding was performed by starting the pressure at 110 ° C. while applying a pressure of about 40 kg / cm 2 and maintaining the pressure at 160 ° C. for 1 hour. Thereafter, a heat treatment was performed at 260 ° C. for 16 hours using a dryer to obtain a molded body.
- This molded body was subjected to a heat treatment at 1000 ° C. at a heating rate of about 10 ° C.Z while flowing nitrogen gas, and was fired to obtain a CZC composite material.
- the bulk density of the obtained material was 1.33 g / cm 3 , and the flexural strength was 34 MPa (Example 21).
- Carbon, fiber 100 parts by volume, average particle size equivalent to 76 parts by volume 3 ⁇ m of boron carbide was added to ethyl alcohol, and dispersed with sufficient stirring.
- the boron carbide powder was thoroughly mixed with a supermixer while applying shearing power to dissolve the powder. Mixing by the super mixer was performed at a rotation speed of one mixer blade of 1,500 rpm for 3 minutes. The same amount of ethyl alcohol was used as the weight of boron carbide.
- a resole type phenol resin as a liquid synthetic resin was added so that the weight ratio with the carbon fiber was 1.2, and the mixture was dispersed with sufficient stirring to form a slurry, thereby preparing a matrix precursor.
- This slurry was uniformly applied to a 2D cloth 3K plain weave cloth (PAN type having a fiber diameter of about 10 ⁇ m) using a doctor blade. At this time, the slurry was rubbed into the cloth in advance so that the slurry penetrated into the cloth, and the remaining slurry was applied to the surface. At this time, the slurry viscosity at the working temperature was 23 mPams. These cloths coated with the slurry were laminated and air-dried. The size of the cloth was 8 Omm x 8 Oram, and 15 sheets were stacked to form a pre-preda laminate having a thickness of about 4 mm. Next, hot pressing was performed according to a conventional method.
- Molding was carried out by starting pressurization from about 4 0 k gZ 1 while applying a pressure of cm 2 10 ° C, held for 1 hour at 16 0 ° C. Thereafter, a heat treatment was performed at 260 ° C. for 16 hours using a dryer to obtain a molded body.
- the molded body was subjected to a heat treatment at 1000 ° C. at a heating rate of about 10 ° C./hour while flowing nitrogen gas, and was fired to obtain a C / C composite material.
- the bulk density of the obtained material was 1.5 g / cm 3 , and the flexural strength was 11 OMPa.
- boron carbide having an average particle size of 3 ⁇ m, equivalent to 32 parts by volume For 100 parts by volume of carbon fiber, add boron carbide having an average particle size of 3 ⁇ m, equivalent to 32 parts by volume, in ethyl alcohol, and stir thoroughly. And dispersed. In advance, the boron carbide powder was thoroughly mixed with a supermixer while applying shearing power to dissolve the powder. The mixing by the super mixer was performed at a rotation speed of the mixer blades of 1500 rpm and a time of 3 minutes. The weight of ethyl alcohol was 2.5 times the weight of boron carbide.
- a resole-type phenol resin as a liquid synthetic resin was added so that the weight ratio with respect to the carbon fiber was 0.8, and the mixture was dispersed with sufficient stirring to form a slurry, thereby preparing a matrix precursor.
- This slurry was uniformly applied to a 2D cloth finely woven spun yarn cloth (PAN type with a fiber diameter of about 1 ⁇ ) using a doctor blade. At this time, the slurry was previously rubbed into the cloth so that the slurry penetrated into the cloth, and the remaining slurry was applied to the surface. At this time, the slurry viscosity at the working temperature was 9 mPa ⁇ s.
- the size of the cloth was 8 Omm x 8 Omm, and fifteen sheets were stacked to form a pre-preda laminate having a thickness of about 5 mm.
- hot pressing was performed according to a conventional method. The molding was carried out by starting pressurization at 110 ° C while applying a pressure of about 40 kgZcm 2 and maintaining the temperature at 160 ° C for 1 hour. Thereafter, a heat treatment was performed at 260 ° C. for 16 hours using a drier to form a molded body. A heat treatment at ° C was performed and firing was performed to obtain a C / C composite material. The bulk density of the obtained material is 1.48 Flexural strength was 45MPa
- a C / C composite was obtained in the same manner as in Example 2, except that the volume fraction of the boron carbide powder in the matrix was 50% by volume. (Comparative Example 2)
- a CZC composite material was obtained in the same manner as in Example 1, except that the volume fraction of the boron carbide powder in the matrix was 50% by volume.
- a CZC composite was obtained in the same manner as in Example 1, except that the volume fraction of the boron carbide powder in the matrix was 52% by volume and the average particle size was 10 im.
- a C / C composite material was obtained in the same manner as in Example 16, except that both the average particle diameters of the boron carbide powder and the silicon carbide powder in the matrix were 10 m.
- a C / C composite material was obtained in the same manner as in Example 1, except that no ceramic powder was contained in the matrix.
- a C / C composite material was obtained in the same manner as in Example 13, except that no ceramic powder was contained in the matrix.
- Comparative Examples 5 and 6 after the resin was attached to the cross, molding and heat treatment were performed according to the steps of Examples 1 and 13.
- Example 20 The procedure was carried out in the same manner as in Example 20, except that boron carbide powder having an average particle size of 3 ⁇ , equivalent to 29 parts by volume, was added to 100 parts by volume of carbon fibers. At this time, the viscosity of the slurry at the working temperature was 10 mPa ⁇ s. The bulk density of the resulting material, 1. 32 g / C m 3 , bending strength was 32MP a.
- Fig. 1 (a), (b) and (c) are tables showing examples and comparative examples collectively. is there.
- Fig. 1 (a), (b) and (c) show the type and volume fraction of carbon fiber, the weight ratio of carbon precursor to carbon fiber, the weight ratio and volume of ceramic powder and carbon fiber.
- the fraction and the volume fraction of the ceramic powder in the matrix after the final heat treatment are shown. That is, the composition of the raw materials of the example and the comparative example is as shown in FIGS. 1 (a) and 1 (b).
- the matrix consists of carbonized carbon precursor and ceramic powder. As characteristics shows bulk density, bending strength, the result of oxidation loss in air (FIG. 1 (c)) 0
- carbon fibers include: (1) a finely woven span yarn cloth (a PAN type with a fiber diameter of about 10 ⁇ m), which is a two-dimensional cloth; and (2) a long carbon fiber continuous yarn plain weave cloth (a PAN type, tensile strength of 3500), which is a two-dimensional cloth.
- Ceramic powders include: 1 boron carbide powder (average Particle size 1 ⁇ , 3111 ⁇ 10 m), 2Carbon carbide powder: average particle size 1 ⁇ , 3 / m and 10 ⁇ ). The ceramic powder used was commercially available as it is or used after classification.
- the average particle size was confirmed with a laser diffraction particle size distribution analyzer (Shimadzu SALD-2000 ⁇ ).
- the carbon precursors in the matrix part are: (1) resole-type phenolic resin, (2) powdered phenolic resin, (3) small mesocarbon spheres, and (4) carbon powder. the average particle diameter of 5 / m was performed, a volatile content of 10 wt. / 0 powder).
- the carbonization yield of the carbon precursor and the true density of the carbonized product were determined in advance.
- a 4 ⁇ 8 ⁇ 75 mm rectangular parallelepiped was used as a test piece for measuring bending strength.
- the plane direction of the cloth was the longitudinal direction
- the fiber direction was the longitudinal direction.
- the direction of 4 mm is the lamination direction of the cloth or sheet.
- the bending test was performed using an Instron testing machine at a span of 60 mm and a crosshead speed of 0.5 mm / min at room temperature with three-point bending.
- the bending strength tended to be higher when the particle size of the boron carbide powder was smaller (for example, compare Examples 1 and 2).
- the combined use with powdered phenolic resin was able to increase the bending strength (Examples 6, 15, 16). This is considered to be a remarkable effect of the composite of fine particles.
- Oxidation depletion tests in air were performed at 800 ° C, 900 ° C, 1000 ° C or 1200 ° C using a commercial electric furnace.
- the test piece was taken out of the electric furnace every hour and the weight was measured to determine the rate of change in weight.
- Ceramic powder containing only boron carbide is monotonous at 900 ° C As a result, the measurement was performed up to 900 ° C.
- the samples without the ceramic powders of Comparative Examples 5 and 6 showed a remarkable weight loss at 900 ° C as compared with the material containing the ceramic powders.
- FIG. 2 to FIG. 6 show the time change of the weight loss due to oxidation consumption for some examples and comparative examples at each temperature.
- the weight decreases slightly with the passage of time. . This is thought to be due to the evaporation of boron oxide.
- the material of the present invention contains boron carbide powder even at 900 ° C.
- the material containing the boron carbide powder and the silicon carbide powder did not show any weight loss, and the oxidation consumption was substantially completely suppressed even at 900 ° C.
- Comparative Examples 5 and 6 almost all of the test pieces disappeared by oxidizing after 5 hours at 900 ° C.
- Examples 10 and 16 which are materials containing boron carbide powder and silicon carbide powder, did not lose weight. Even at 1000 ° C., the oxidation consumption is substantially completely suppressed. In Comparative Example 4, an initial weight loss occurred.
- Examples 10 and 16 which are materials containing boron carbide powder and silicon carbide powder, showed a weight loss at the beginning of oxidation consumption. It happens, but there has been little weight loss since then. In Comparative Example 4, the weight monotonously decreased with the passage of time.
- FIG. 6 shows the time change of weight loss due to oxidative consumption at 800 ° C. in Examples 19 to 22 and Comparative Example 7. As shown in FIG. 6, at 80 ° C, all the examples showed a slight increase in weight at the beginning of oxidative consumption. The consumption by oxidation was substantially suppressed without showing any weight loss. Comparative Example 7 shows that when the amount of boron carbide is less than 32% by volume with respect to the volume of the carbon fiber, weight loss due to oxidation gradually occurs.
- the oxidation-resistant cZc composite material of the present invention was able to completely suppress the decrease due to oxygen at 800 ° C. when only the boron carbide powder was included among the ceramic powders. Further, even at 900 ° C., the decrease due to oxidation can be extremely reduced. In addition, when both the boron carbide powder and the silicon carbide powder were included in the ceramic powder, the reduction due to oxidation could be completely suppressed up to 1000 ° C. At 1200 ° C, the initial weight loss is within 10%, After that, the weight loss is suppressed and it is suitable for use as an oxidation resistant material up to 1200 ° C. Industrial applicability
- An oxidation-resistant C / C composite material having substantially no oxidative consumption at 800 ° C. in the air and excellent mechanical properties such as high toughness can be produced by a simple method.
Description
Claims
Priority Applications (4)
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AU2003212005A AU2003212005A1 (en) | 2002-02-14 | 2003-02-14 | Oxidation resistant carbon fiber reinforced carbon composite material and process for producing the same |
JP2003567843A JPWO2003068707A1 (ja) | 2002-02-14 | 2003-02-14 | 耐酸化性炭素繊維強化炭素複合材料及びその製造方法 |
US10/503,597 US7364794B2 (en) | 2002-02-14 | 2003-02-14 | Oxidation resistant carbon fiber reinforced carbon composite material and process for producing the same |
EP03705184A EP1481954A4 (en) | 2002-02-14 | 2003-02-14 | OXIDATION-RESISTANT CARBON FIBER REINFORCED CARBON COMPOSITE MATERIAL AND METHOD OF MANUFACTURING THEREOF |
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JP2002036669 | 2002-02-14 | ||
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WO2003068707A1 true WO2003068707A1 (fr) | 2003-08-21 |
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PCT/JP2003/001584 WO2003068707A1 (fr) | 2002-02-14 | 2003-02-14 | Materiau composite carbone renforce a fibre de carbone resistante a l'oxydation, et procede de production dudit materiau |
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US (1) | US7364794B2 (ja) |
EP (1) | EP1481954A4 (ja) |
JP (1) | JPWO2003068707A1 (ja) |
AU (1) | AU2003212005A1 (ja) |
WO (1) | WO2003068707A1 (ja) |
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JP2005112703A (ja) * | 2003-09-16 | 2005-04-28 | National Institute Of Advanced Industrial & Technology | 低摩擦低摩耗窒化ケイ素基複合材料及びその製造方法 |
CN116396090A (zh) * | 2023-04-12 | 2023-07-07 | 西安交通大学 | 一种碳化硅/碳化硼陶瓷骨架增强碳基复合材料及制备方法和应用 |
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US9174412B2 (en) * | 2011-05-16 | 2015-11-03 | Brigham Young University | High strength carbon fiber composite wafers for microfabrication |
US20150299053A1 (en) * | 2012-11-26 | 2015-10-22 | Toyo Tanso Co., Ltd. | Method for controlling characteristics of ceramic carbon composite, and ceramic carbon composite |
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CN116462523A (zh) * | 2023-04-13 | 2023-07-21 | 中国科学院上海硅酸盐研究所 | 一种基于MCMB的激光3D打印Cf/SiC复合材料及其制备方法 |
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US20050142346A1 (en) | 2005-06-30 |
EP1481954A4 (en) | 2010-03-03 |
EP1481954A1 (en) | 2004-12-01 |
AU2003212005A1 (en) | 2003-09-04 |
JPWO2003068707A1 (ja) | 2005-06-02 |
US7364794B2 (en) | 2008-04-29 |
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